Testing-machine.



PATENTED NOV. 8, 1904.;

W. J. TRETGH.

TESTING MACHINE.

APPLICATION FILED MAY 6. 1904.

NO MODEL.

Patented. November 8, 1904.

UNITED STATES PATENT OFFICE.

WVILLIAM J. TRETCH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO FREDERICK A. RIEHLE, OF PHILADELPHIA, PENNSYLVANIA.

TESTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 774,212, dated November 8, 1904.

Application filed May 6, 1904. Serial No. 206,687. (No model.)

To all whmn it 77Q/6LZ/ concern.-

Be it known that 1, WILLIAM J. TRE'roH, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a novel construction of Testing-Machines, of which the following is a specification.

My application relates to testing-machines, and particularly to that class in which a receptacle for shot is employed, the shot being allowed to escape until the constant balanceweight is sufficient to overcome the resistance of the test-piece. It provides means for shutting off the flow of shot from the receptacle when the movement of the beam occurs.

It further consists of novel features of construction, all as Will be hereinafter fully set forth.

Figure 1 represents in side elevation a testing-machine embodying my invention. Fig. 2 is a vertical section of the novel portion of the device. Fig. 3 represents in bottom plan view the lower portion of the device shown in Fig. 2.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings, 1 designates the base of the testing-machine, from which rises a standard 2, at the upper end of which is pivoted a scale-beam 3. at one end a constant weight 4. As shown the machine is fitted up for testing of pieces of cement or the like and is provided with a lower grip 22, connected to the base of the machine by means of the screw 23, which is connected with said grip by the block 24, which is guided by the bearing 25, connected with the standard of the machine.

26 and 27 designate hand-wheels which can be operated to adjust the position of the grips and to take up slack and apply load.

28 designates the upper grip, which is pivoted to the lever 29, which latter is mounted in the clevis 30, suspended from the frame, the opposite end of said lever being connected with the beam by the rod 31. A suitable pointer 32 is connected with the frame in order to indicate the center line of the beam.

The shot-receptacle 5 is shown as provided The scale-beam carries 1 with a bail 6, by which it may be conveniently suspended from the scale-beam 3. It has a funnel or dish shaped bottom 7, from which rises within the receptacle a tube 8, open at its ends and having lateral openings 9. Fitting closely within the tube 8 is a sleeve 10, which may be provided with a cap or handle 11 at its upper end and has at its lower end a transverse partition 12, in which is a slot 13. Secured to the standard 2 is an arm 14, carrying in its outer end a funnel 15. At the bottom of the funnel 15 is a spider 16, providing openings 17 through the bottom of the funnel. At the center of the spider 16 is a boss 18, from which rises a rod 19, whichpasses upward through the slot 13 into the sleeve in the shot-receptacle 5. Each end of the rod 19 is threaded and provided with nuts 20 21, respectively.

The operation is as follows: A test-piece or specimen is engaged in the grips, and the beam 3 is balanced by putting the proper amount of shot into the receptacle 5, the apertures 9 being closed. The sleeve 10 is then raised to the position shown in Fig. 2 of the drawings, so as to permit the shot to pass out of the apertures 9 through the funnel and thence into the pan of a scale, (not shown,) which may be placed on the base 1 of the machine.

It is evident that the shot will continue to flow from the receptacle 5 until the excess gravimetric force of the weight 4 is suflicient to disrupt the specimen. The scale-beam 3 will then be tilted, raising the receptacle 5. When the nut strikes the partition 12, it Will draw the sleeve 10 downward, so as to close the aperture 9 and cut off the further flow of shot. The weight of shot in the pan will by a simple calculation show the resistance to breaking strain of the specimen or testpiece.

It is evident that the time of closure of the aperture 9 relative to the movement of the scale-beam 3 may be regulated by means of the nuts 20 and 21 on the base 19. By making the slot 13 parallel with the beam 3 the swinging movement of the receptacle 5 does not tend to contact the side of the rod 19 with the partition 13. It is also evident that the l funnel 15 acts to collect the shot issuing from the apertures 9 and to insure that they are all deposited in a suitable receptacle, such as a scale-pan, which may be placed beneath the funnel.

By the term shot wherever used it is evident that I include any mechanical equivalent thereof which may be solid or liquid, it being only necessary that it be finely divided or divisible, so as to readily pass the apertures 9 and 17.

It will be evident that various changes may be made by those skilled in the art which may come within the scope of my invention, and I do not, therefore, desire to be limited in every instance to the exact construction herein shown and described.

It will of course be understood that my device is applicable to a scale as well as to a testing-machine and that I do not desire to be limited to the particular application of the invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a testing-machine, a shot-receptacle having an emission-aperture, means within said receptacle for closing said aperture, a stationary portion below said receptacle and means rising from said stationary portion and normally disengaged from said closing means but adapted to engage with said closing means to positively hold the same when the shot-receptacle is moved upward by reason of the breaking of a specimen.

2. In a testing-machine, a shot-receptacle having an emission-aperture,closing means for said aperture, a stationary portion below said receptacle and adjustable means rising from said stationary portion normally disengaged from said closing means and having its upper end situated above said emission-aperture and adapted to hold said closing means when the shot-receptacle is moved upward by reason of the breaking of a specimen.

3. In a testing-machine, a shot-receptacle, a tube within said receptacle having a lateral aperture near its lower end, a sleeve vertically movable within said tube and adapted to close said aperture, a stationary portion and a rod connected with said stationary portion and extending into said sleeve but normally out of contact therewith and adapted to actuate said sleeve to close said aperture when the shot-receptacle is moved upward by reason of the breaking of the specimen.

4. In a testing-machine, a shot-receptacle, a tube within said receptacle havinga lateral aperture near its lower end, a sleeve vertically movable within said tube and adapted to close said aperture, a transverse slotted partition in said sleeve, a stationary portion, a bolt connected with said stationary portion and passing through said partition and means on said bolt within said sleeve for engaging said partition whereby the aperture in said tube is closed when the receptacle is moved upward by reason of the breaking of a specimen.

5. In a testing-machine, a shot-receptacle, a tube within said receptacle having an aperture near its lower end, a sleeve movable within said tube and adapted to close said aperture, a bolt suitably supported and extending into said sleeve and means on said bolt within said sleeve for engaging with the latter, whereby the aperture in said tube is closed when the receptacle is moved upward by reason of the breaking of a specimen.

6. In a testing-machine, a shot-receptacle having an aperture therein, a sleeve movable in said receptacle for closing said aperture and means extending into said sleeve, the upper end of which is protected by said sleeve and adapted to engage therewith in order to operate said sleeve to close the aperture when the receptacle is moved upward by reason of the breaking of a specimen.

WILLIAM J. TRETGH.

Witnesses:

JOHN A. W IEDERSHEIM, GEO. L. (100mm. 

